Contents  on 29 June '17

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 29 June '17

Four objects reported inside ten LD

Today there are four Solar-System small bodies known to be less than ten lunar distances (LD) from our planet. Closest are 2017 MC1 inbound from 5.54 to 3.43 LD, 2017 MB3 moving in from 5.56 to 5.09 LD, and 2017 MA3 outbound from 4.76 to 6.45 LD.

Earth passage I D ~Size Distance Today  Notes
2.52 LD tomorrow2017 MC1 42 m  3.43 from 5.54 LD DOU
3.23 LD June 272017 MA3 15 m  4.76 to 6.45 LD
4.99 LD tomorrow2017 MB3 29 m  5.09 from 5.56 LD DOU
5.38 LD July 32017 ME4 19 m  7.66 from 8.80 LD
Approaching
3.12 LD July 232017 BS5 51 m  < 10 LD July 16, NHATS target
6.50 LD July 22017 MC3 51 m  < 10 LD tomorrow - DOU
7.6   LD July 112017 MC4 147 m  < 10 LD July 9, uncertainty +/- 37 mins.

This report was generated at 1824 UTC with follow-up in today's DOU MPEC for three objects active in the accompanying traffic table and for departed radar targets 2017 CS and 441987 2010 NY65.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting on transient natural objects that approach the actually significant gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 29 June '17

The MPC's NEO Confirmation Page has 63 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 63 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 91 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 29 June '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 29 June '17 >>  MPEC 2017-M95 - "12:00 UT" - Daily Orbit Update


MPEC 2017-M94 - "02:31 UT" - 2014 NE64


MPEC 2017-M93 - "02:09 UT" - 2017 MC5


MPEC 2017-M92 - "02:05 UT" - 2017 MB5


MPEC 2017-M91 - "02:03 UT" - 2017 MA5


MPEC 2017-M90 - "01:59 UT" - 2017 MZ4


MPEC 2017-M89 - "01:51 UT" - 2017 MY4


MPEC 2017-M88 - "01:48 UT" - 2017 MX4


MPEC 2017-M87 - "01:45 UT" - 2017 MW4


MPEC 2017-M86 - "01:41 UT" - 2017 MV4

Observers  on 29 June '17

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2017-M88, 2017-M89, 2017-M91, 2017-M92, 2017-M93 & 2017-M95 -- 2017 MY4, 2017 MX4, 2017 MC5, 2017 MB5, 2017 MA5, 2016 YX7
T08ATLAS Mauna Loa in Hawaii, 26 in MPECs 2017-M90, 2017-M92 & 2017-M95 -- 2017 MZ4, 2017 MB5, 2017 MB3, 2017 CS, 2010 VB1, 2007 MT20, 68348, 54789, 52750, 495331, 441987, 416584, 39796, 20255, 190166, 163696, 142040, 141056, 12538, 100926, 7888, 6063, 4954, 2329, 1980, 1917
160Castelmartini Obs. in Italy, 1 in MPEC 2017-M95 -- 2010 VB1
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2017-M92 & 2017-M95 -- 2017 MB5, 2017 MA, 2017 KE5, 2014 YC15, 2008 MH1, 96631, 488494, 485652, 385580, 136923, 6053, 5751
Z45Cosmos Obs., 1 in MPEC 2017-M95 -- 20460
734Farpoint Obs. in Kansas, 1 in MPEC 2017-M93 -- 2017 MC5
K88GINOP-KHK in Hungary, 2 in MPECs 2017-M92 & 2017-M93 -- 2017 MC5, 2017 MB5
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2017-M90 -- 2017 MZ4
W19Kalamazoo Obs. in Michigan, 2 in MPEC 2017-M95 -- 190166, 11398
246KLENOT in the Czech Republic, 1 in MPEC 2017-M92 -- 2017 MB5
568_Marco Micheli on Mauna Kea in Hawaii, 3 in MPECs 2017-M87, 2017-M88 & 2017-M91 -- 2017 MX4, 2017 MW4, 2017 MA5
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2017-M93 & 2017-M95 -- 2017 MG4, 2017 MC5, 2017 MB4, 2014 SR339, 2011 WV134, 2010 EK12, 68348, 422699, 415715, 363024
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2017-M86, 2017-M87, 2017-M88, 2017-M89, 2017-M90 & 2017-M91 -- 2017 MZ4, 2017 MY4, 2017 MX4, 2017 MW4, 2017 MV4, 2017 MA5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2017-M95 -- 2010 VB1, 2004 MD6
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2017-M86 -- 2017 MV4
W25RMS Obs., 12 in MPECs 2017-M92 & 2017-M95 -- 2017 MW2, 2017 MD3, 2017 MC3, 2017 MC1, 2017 MB5, 2017 MB1, 2017 LW, 2017 KE5, 366733, 142561, 138846, 106589
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2017-M92 -- 2017 MB5
Y00SONEAR in Brazil, 1 in MPEC 2017-M95 -- 21088
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2017-M87 & 2017-M95 -- 2017 MW4, 2017 KV31, 2017 KP31, 2017 FU158, 2004 AH
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2017-M95 -- 2017 BL6, 2016 YX7
I52Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPECs 2017-M86, 2017-M87, 2017-M88, 2017-M91, 2017-M92, 2017-M93 & 2017-M95 -- 2017 MZ, 2017 MX4, 2017 MW4, 2017 MV4, 2017 ME3, 2017 MC5, 2017 MB5, 2017 MB3, 2017 MA5
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2017-M90 -- 2017 MZ4
718Wiggins Obs. in Utah, 1 in MPEC 2017-M92 -- 2017 MB5
C51WISE in Earth polar orbit, 1 in MPEC 2017-M94 -- 2014 NE64
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 June '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2017 MB1NEODyS16052082-211754.44e-09-5.31-5.350NEODyS: "Based on 100 optical observations (of which 0 are rejected as outliers) from 2017-06-19.315 to 2017-06-28.410."
JPL Sentry15402082-211753.8053e-08-4.19-4.340JPL: Computed at 07:51 today Pacific time based on 100 observations spanning 9.0946 days (2017-Jun-19.31418 to 2017-Jun-28.40878). Diameter approximately 0.629 km. from weighted mean H=18.64.
2014 NW64NEODyS1540R E M O V E D-

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 29 June '17

Times are UTC for when items were noted or added by The Tracking News.

1824Generated Traffic Report
1605Noted that NEODyS has updated its 2017 MB1 risk assessment - see above
1540Noted that NEODyS has removed 2014 NW64 as an impact risk - see above
Noted that JPL Sentry has updated its 2017 MB1 risk assessment - see above
Grabbed MPEC 2017-M95 - Daily Orbit Update - see above
0336Grabbed MPEC 2017-M86 - 2017 MV4 - see above
Grabbed MPEC 2017-M87 - 2017 MW4 - see above
Grabbed MPEC 2017-M88 - 2017 MX4 - see above
Grabbed MPEC 2017-M89 - 2017 MY4 - see above
Grabbed MPEC 2017-M90 - 2017 MZ4 - see above
Grabbed MPEC 2017-M91 - 2017 MA5 - see above
Grabbed MPEC 2017-M92 - 2017 MB5 - see above
Grabbed MPEC 2017-M93 - 2017 MC5 - see above
Grabbed MPEC 2017-M94 - 2014 NE64 - see above